Band printing-stamp.



C. S. ELLIS.

BAND PRINTING STAMP.

. APPLICATION FILED APR. 3, 1911.

1,069,868,, Patented Aug. 12, 1913.

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CHARLES S. ELLIS, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

' 7"" BAND PRINTING-STAMP.

Patented Aug. 12,1913.

Application filed. April 3, 1911. Serial No. 618,502.

To all whom it may concern Be it known that I, CHARLES S. ELLIS, acitizen of the United States, and a resident of Chicago, in the countyof Cook and State of Illinois, have invented certain new and usefulImprovements in Band Printing- Stamps; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the charac ters ofreference marked thereon, which form a part of this specification.

This invention relates to improvements in band dating stamps and theinvention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

Among the objects of the invention is to provide an improvedconstruct-ion in such stamps whereby to maintain the types in alinementat the printing line of the stamp, and a further object of the inventionis to provide an improved drum about which the type bands are trainedand which actuate the bands to compose the type at the printing line.

As shown in the drawings,-Figure 1 is a side elevation of a stampembodying my invention. Fig. 2 is a section on the line 22 of Fig. 1.Fig. 3 is an edge elevation of a short section of one of the type bands.Fig. 4 is an axial section of one of the type'band drums. Fig. 5 is aperspective view of the fixed member of the frame to constitute the typebacking or support.

The frame of the stamp comprises a transverse member 10, two sidemembers 11, 11, usually formed integral with the transverse member, anda bar 12 which extends between and is attached in any suitable manner atthe ends to the free ends of the members 11 and is provided at its sidemargins with stiffening flanges 13.

14, 15, 16 designate endless type bands which are trained about drums 17and the fixed bar 12, said bar constituting the backing bar for the typeat the printing line. The drums 17 are rotatively mounted on thetransverse shaft 18 which extends between and is secured in any suitablemanner to the side members 11, 11 of the frame.

In accordance with one feature of my invention the type bands 14, 15 and16 are provided at their rear sides, opposite to the types 20, withspaced, interlocking portions adapted to engage a complementally shapedsurface on the outer side of the backing bar 12; the arrangement beingsuch that when the interlocking parts of the band and the fixed backingbar are engaged the bands are positively locked from turning orshift-ing. Thereby the types which are composed at the printing line areheld in accurate alinement. The particular configuration of the bandsand the backing bar which I have shown for eifecting this resultconsists in.

providing the bands at their rear sides, and opposite to the types withspaced, raised or transversely convex projections 21 and to form theouter face of the backing bar 12 with longitudinally disposed,transversely concave recesses 22 adapted to fit the projections on thebacks of the bands, as best shown in Fig. 2. The depth of theprojections of the bands and the depressions of the backing bar aresomewhat exaggerated in the drawings to illustrate this feature of theinvention. In practice, said projections and the backing bar recess neednot be very pronounced or of great depth in order to effect theinterlocking engagement of the bands and frame member or backing bar forthe purpose stated.

lVhen the bands are provided with the transverse, convex projections 21shown the drums 17 will be provided on their peripheries withcomplemental grooves or corrugations 23 in which the said bandprojections fit. This arrangement produces an interlocking connectionbetween the drums and bands such as will prevent the bands slippingthereon and insure prompt and accurate re-setting movement of the bandswhen the drums are turned to compose the type at the printing line. Thesaid drums are provided at their ends with the usual notcheddisks orflanges 24 which extend beyond the drums and the frame in such a manneras to be readily engaged by the fingers to turn the drums in resettingthe type bands.

As a further improvement I have constructed the principal part of eachdrum of a single piece of sheet metal, it being drawn or swaged to formthe cup-shaped portion 25, having at one end an integral wall 26 and atits other end the flange 24. The open end of the drum is filled by aplate 27 and said plate 27 and the end wall of the drum are providedwith axial apertures 28, 29, respectively, through which extends theshaft 18 upon which said drums are journa-led. The construction shownprovides a drum and its actuating flange which is simple and economicalto construct, and which insures that the drum will be concentric withrespect to its notched actuating flange.

The stamp may be provided with a familiar form of hand piece 30 by whichto manipulate the stamp when it has the form of the simple dating stampshown. The invention, however, is not limited to the type of stamp shownbut may be used on any form of stamp employing a type band or bandstrained about a fixed part of the frame which backs or supports the typeat the printing point, and having means for shifting or turning thebands to compose the type at the printing line.

I claim as my invention l. A band printing stamp comprising a framehaving a fixed type supporting member at the printing line which isprovided with an exterior, longitudinal concave seat, type bandsarranged side by side and provi ded on their outer sides with spacedtype projections and trained across said fixed member, actuating andsupporting means about which said bands are also trained, said typebands being provided on'their inner sides with rounded projectionsspaced to correspond with said type projections and adapted to engagesaid fixed concave seat, and to slip past the same, whereby the typeproject-ions are held in alinement by engagement of said projectionswith said fixed concave seat.

2. A. band printing stamp comprising a frame having a fixed typesupporting member at the printing line which is provided with anexterior, longitudinal concave seat, type bands arranged side by sideand provided on their outer sides with spaced type projections andtrained across said fixed member, drums journaled in the frame andprovided with peripheral recesses about which the type bands aretrained, said type bands being provided on their inner sides withrounded projections spaced to corre spond with the type projections andadapted to engage said concave seat of said fixed member and therecesses of said drums, and to slip past said concave seat,

In testimony, that I claim the foregoing as my invention I afiix mysignature in the presence of two witnesses, this 25th day of March A. D.1911.

CHARLES S. ELLIS.

W'itne'sses:

WVILLIAM L. HALL, VILLIAM GoLoBnRoER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

